The race to one million had been monitored by hundreds of blogs and news outlets, including TechCrunch, VentureBeat, CNN, and ABC News.
Kutcher will celebrate the milestone live on the Oprah Winfrey Show on Friday. He has said that Oprah will send out her first ever tweet during the broadcast using the Twitter name @Oprah.
Kutcher passed CNN for the first time Thursday before CNN regained the lead after an on-air shout-out by personality Anderson Cooper. But Kutcher fired back with this tweet and his own broadcast via UStream.TV:
Here's a screenshot from the UStream broadcast of Kutcher watching with wife Demi Moore when he had reached 995,000 followers.
The Twitterverse celebrated the milestone.